Change naming conventions
Move from Unirest to HttpComponents
UserAgent, Better Client support
1.6 and better
Merge branch 'javaism' of github.com:sendgrid/sendgrid-java into javaism
Xlint enabled
Resolved warnings
Linted tests
Added convenience method like javax.mail
Merge branch 'javaism'

Conflicts:
	src/main/java/com/sendgrid/SendGrid.java
	src/test/java/com/sendgrid/SendGridTest.java